Improvement in safety-valves



' duited nRAsTUs s. BENNETT, or NnWYoRK, N. Y.,Ass1GNoR To HiM? SELF AND JUSTUS SMITH, OF SAME PLACE.

Letters .Patent No. 86,126, dated January 26, 1869; mitezlated Jan-11cm] 21, 1869.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it may concern:

ABe it known that I, EnAsTUs S. BnNNnTLof the city, county, and State of New York, have invented a new and useful Improvement in the Construction of by means of which low Water or high pressure made t0 open the furnace-door or doors, open a supplemental voutlet for steam, close the damper in the chimney, or

smoke-stack, ring va bell in any part of the building or vessel, and blow an alarm-whistle, all automatically, so that ample warning of approaching danger from either high pressure or low water is given, and the remedies or preventives applied instantly, automatically, and electually.

To enable others skilled in the art to make and use my invention,'I will proceed to describe its construction and operation.

Figure No. 1 represents the line view of a half section of my valve and combinations.

B, a Weight, composed of a number of metallic plates, which Vary in thickness, and are provided with a hole in the centre, through which the valve-stem C passes, onwhich they are secured by the nut D.

E E, the valve.

F F, its jacket.

G G, openingsAin said jacket,

H H, passages for escaped steam.

I I, casing for valve-jacket, supplied at the top With a short flange, by which it is fastened to the plate A A.

' At the bottom of the casing the plate J J is fastened. Said plate is a rest for the valve E E, and its jacket F F, and guide for the valve-stem G. It is supplied also with a supplemental guide, and furnishes the fulcrum for the float-arm 13 g the holes K K allowing the steam free admission to the interior of the valve. 4

M, an ordinary steam-Whistle, communicating With one of the steam-passages H, and directly withthe boiler', by means of the brauch-pipe 1W, (dott-ed lines,) which pipe is furnished with a cock, so that steam may be made 'to blow the whistle independently oi' the passage H, When desired.

N N, a cylinder, communicating, by means of the pipe 0 0, with the other passage H.

P, its piston.

Q, its piston-rod.

S, a blockv fastened to the outer end of the pistonrod, and made by it to move on the slide lt.

The dotted lines T T T, show connecting-rcds, by

means of which, when the piston is pushed out, the damper U in the smoke-stack is closed, thel outlet V is opened, the belll is rung, and the furnace-door is opened, (17.) Any simple device at the end of the rod, may be used for this latter purpose. I have shown in 17, a wedge, which being pulled over a pin, 18, raises the latch.

L, a hollow metallic float.

13, its arm.

4, knuckle-joint.

5, fulcrum.

Figure. No. 2, bottom view of plate J J, showing openings K K, fulcrum 5, and supplemental guide 20, by dotted lines.

C, hole for valve-stem.

Figure No. 3, top View of valve E.

Y Y Y, holes through the large or lower portion of the valve.

Figure No. 4, top View of valve-jacket F F in its case I I, showing passages for escaped steam H H and 6 6 6 6, lugs 3 3, and projections 2 2 2 2.

' Figure No. 5, top of plate AA, showing slides R R,

bed-pieces X X for cylinder, passages for escaped steam 6 6 6 6, Vthe hole 7 connecting the cylinder N N, by means of the pipe O O, (Fig. No. 1,) with the steampassage H, (tigs. 4 and 7 and the hole 8 connecting the whistle M by means of pipe, with the other steampassage H, (figs. 4 and 7.) The top of lugs 3 3 is also. seen in this iigure.

Figure No. 6, a perspectiveot` the whole, minus the connecting-rods and their appurtenances. (These must be of sizeiand 'shape to suit various cases. See Fig. No. 1.)

B, Weight.

L, float.

13, iioat-arm.

f1, a knucklejoint in said arm.

5, its fulcrum.

I, casing.

A, plate.

M, whistle.

NV, its separate connection with the boiler.

R, slides.V

S, sliding block.

Q, piston-rod.

N N, cylinder.

3 3, lugs, (shownin iig. 7.)

6 6 6 6, openings for escaped steam.

Figure No. 7, perspective of the valve-jacket F, (Figs. No.1 and 4.)

2 2 2, projections, which, itting tightly into corresponding grooves in the casing I I, form the separate passages H H. The ,openings G G are also seen in this figure. They-are six in number, four large and two smaller ones. The ange at the bottom is intended, in connection with the plate J, (Fig. No. 1,) toform a tight joint with the case l I.

Return to Fig. No. l. The piston P and valve E are made steam-tightby vmeans of suitable packing, at

9 9 9 9. The steam has at all times a free access to the space 10, but cannot pass into space 11, so that in space 11 there can be no pressure. (A small hole in the cap 12, provides for any slight leakage.) Hence, the upward pressure is in proportion to the size of the upper space, or the diameter cf lthe upper portion of the valve, independently of the size ofthe lower part.

The inode of operating the valve is quite simple. The Weight B is adjusted to the diameter of the upper part of valve E E, and the desired amount of pressure, by adding to (or removing) plates from the weight.

. When the pressure exceeds the amount to be allowed,

it raises the valve E E, and steam, passing through the openings G G to the passages 6 6 66,v escapes to the open air, and through H H to the cylinder and whistle,

so thatsaid whistle is blown and the piston pushed outward at the same time. When the piston-.rod is pushed out, it being connectedfat T, with the damper in the smokestack, it closesyit another or the v same conneet-- -ing-rod opens the valve V, and permits steam to escape from the boiler through the pipe X; another or the same rod, or a branch of it, T, leads to the furnacedcor 17, and opens it. A. wire, attached atv any suitable point to either of the connecting-rods, is made to ring a. bell, 16.,v

The pump may be set in motionby the same means, and the grate-bars let down,- if desired.

Thev whole is operated .in the same manner, by means of low'water in the boiler.

vThe oat opens the valve by means-ofl its arm 13 and fulcrum 5, acting on the stem C, when the Water reaches ,low-water line. High Water does not aiect the valve, o wing to the knuckle-joint 4.

byLetters Patent, is-

- 1. The arrangement ofthe float L,adj ustable weight vB, valveE, and outlets H H and 6 6 6 6, substantiallyas described.

2., The' combination of the cylinder N, piston Q, and

`connecting-rods T T, with a safety-valve, substantially as described. V

y v E. S. BENNETT.

Witnesses: l

G. R. HYLAND, R. C. MURRAY. 

